Implement basic UCI framework

ArduChess.ino

@@ -8,6 +8,7 @@
 #include "Move.h"
 #include "Movegen.h"
 #include "Types.h"
+#include "Uci.h"
 
 unsigned long pseudo_perft(byte depth) {
 	// only checks pseudolegality
@@ -182,4 +183,5 @@ void setup() {
 
 void loop() {
 	// put your main code here, to run repeatedly:
+	handle_uci();
 }

Uci.h

@@ -0,0 +1,78 @@
+#ifndef __UCI_H_INC
+#define __UCI_H_INC
+
+typedef void uci_return;
+typedef uci_return (*uci_handler)();
+
+struct uci_cmd {
+	char* command;
+	uci_handler handler;
+};
+
+uci_return uci_hello() {
+	Serial.println(F("id name ArduChess\nid author Quinten Kock\nuciok"));
+}
+
+uci_return uci_unimpl() {
+	Serial.println(F("Function not implemented yet"));
+}
+
+uci_return uci_unknown() {
+	Serial.println(F("Not an UCI command"));
+}
+
+const uci_cmd UCI_COMMANDS[] = {
+	{"uci", &uci_hello},
+	{"debug", &uci_unimpl},
+	{"isready", &uci_unimpl},
+	{"setoption", &uci_unimpl},
+	{"ucinewgame", &uci_unimpl},
+	{"position", &uci_unimpl},
+	{"go", &uci_unimpl},
+	{"stop", &uci_unimpl},
+	{"ponderhit", &uci_unimpl},
+	{"quit", &uci_unimpl},
+};
+
+const uci_cmd UCI_INVALID = {"", &uci_unknown};
+
+uci_cmd get_uci_command(char* command) {
+	size_t command_num = sizeof(UCI_COMMANDS) / sizeof(uci_cmd);
+	for(int i = 0; i < command_num; i++) {
+		int ci = 0;
+		uci_cmd to_try = UCI_COMMANDS[i];
+		while(true) {
+			if(to_try.command[ci] != command[ci]) {
+				break;
+			}
+			if(command[ci] == '\0') {
+				return to_try;
+			}
+			ci++;
+		}
+	}
+	return UCI_INVALID;
+}
+
+String read_word() {
+	int incoming = Serial.read();
+	String str = String();
+	do {
+		if(incoming != -1) {
+			str += (char)incoming;
+		}
+		incoming = Serial.read();
+	} while(incoming != '\n' && incoming != ' ');
+	return str;
+}
+
+uci_return handle_uci() {
+	if(Serial.available()) {
+		// There is input available; so likely a command
+		String command = read_word();
+		uci_cmd handler = get_uci_command(command.c_str());
+		handler.handler();
+	}
+}
+
+#endif